I'm looking to upgrade from a Futaba 401. JR770 or Spartan Quark are the two I'm looking at. I am not a hard core 3D flyer but I am looking for something a step or two above the 401 at this point. I do tumble, loop, roll, fly some inverted.

On the cheap, the Align GP750 (not the 780) is much better than the 770 or 401, and can be found used for around $50, no tail blow out flying backwards!!!!

How does the Align 750 compare to the Spartan Quark? Despite Poverns claim that Quarks come up for sale all day long for under $100, I haven't seen one come up for sale since his post 5 days ago . I have run across a couple Align 750's though.

We're talking 90 size machines here.

Then I would go with either (Spartan), but lean towards the 760. I remember somewhere that the quark was designed with the Micros (250) sized helis. They work great on big ones, but I run 760's on anything that is 450 and larger. Why? they are cheaper, and they fly great.